The story of the Czechoslovak runner Emil Zátopek is a tale from athletics’ age of innocence. Without the aid of qualified coaches, state-of-the-art equipment or ‘performance-enhancing’ drugs, Emil Zátopek set no fewer than 18 world records over distances between 5,000 and 30,000 metres with a style memorably described as that of ‘a man wrestling with an octopus on a conveyor belt’: all eccentricity above the waist, all efficiency below it.